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Gastric mill

A food grinding apparatus in the foregut of decapod crustaceans; in penaeid shrimps, consists of denticles (tooth-like processes) and lateral ridges in wall of anterior chamber; in crayfishes, lobsters, and crabs, consists of one dorsal and two lateral teeth at junction of anterior and posterior chambers. [Bliss, 1982]
Apparatus of varying complexity in stomodeum which serves to break up food; consists of framework of movably articulated ossicles developed as thickened and calcified part of stomodeal lining, most highly specialized in decapods. [Moore and McCormick, 1969]
Heavily sclerotized teeth of the cardiac stomach of most decapods. [Brusca and Brusca, 2002]
The structures responsible for grinding food within the stomach (Fig. 10). [Warner, 1977]
(Taxon-specific: Order Decapoda) Grinding apparatus in posterior region of cardiac stomach. If fully developed, consists of muscular stomach walls bearing plates (ossicles), projecting teeth, and various pads and folds. [Stachowitsch, 1992]
(Taxon-specific: Subclass Cirripedia) Apparatus in cardiac stomach (stomodeum) with framework of movably articulated ossicles developed as thickened and calcified parts of stomodeal lining used to break up food, most highly specialized in decapods; also chitinous triturating apparatus in foregut of some acrothoracicans. [McLaughlin, 1980]
(Taxon-specific: Class Ostracoda) In certain ostracods, term occasionally applied to lamellar respiratory process located dorsally on trunk. [Stachowitsch, 1992]